commit 9d4eb6f3896154134eed8971e10b90cf52a95392
author Vitaly Buka <vitalybuka@google.com> Thu Jun 02 00:24:20 2016 +0000
committer Vitaly Buka <vitalybuka@google.com> Thu Jun 02 00:24:20 2016 +0000
tree 1f99731a8cd4fbb486a78bbb7eae6da55443f2ec
parent f818b86348daa08d9040a33ce694c91a68502dd7

[asan] Added -fsanitize-address-use-after-scope flag

Summary:
Also emit lifetime markers for -fsanitize-address-use-after-scope.
Asan uses life-time markers for use-after-scope check.

PR27453

Reviewers: kcc, eugenis, aizatsky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D20759

llvm-svn: 271451

clang/lib/Driver/SanitizerArgs.cpp

diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 5e6af4b..d64ac53 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -559,6 +559,14 @@
     }
   }
 
+  AsanUseAfterScope =
+      Args.hasArg(options::OPT_fsanitize_address_use_after_scope);
+  if (AsanUseAfterScope && !(AllAddedKinds & Address)) {
+    D.Diag(clang::diag::err_drv_argument_only_allowed_with)
+        << "-fsanitize-address-use-after-scope"
+        << "-fsanitize=address";
+  }
+
   // Parse -link-cxx-sanitizer flag.
   LinkCXXRuntimes =
       Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
@@ -655,6 +663,9 @@
     CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
                                          llvm::utostr(AsanFieldPadding)));
 
+  if (AsanUseAfterScope)
+    CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-use-after-scope"));
+
   // MSan: Workaround for PR16386.
   // ASan: This is mainly to help LSan with cases such as
   // https://code.google.com/p/address-sanitizer/issues/detail?id=373